docs: def accuracy2(Ntp, Nfp, Nfn, eps=numpy.spacing(1)):
      """Accuracy
  
      Implements metric described by [1]_.
  
      .. [1] Dixon, S.
             "On the computer recognition of solo piano music".
             Proceedings of Australasian Computer Music Conference, July 2000, Brisbane, Australia, pp. 31–37.
             http://www.eecs.qmul.ac.uk/~simond/pub/2000/acmc.pdf
  
      Parameters
      ----------
      Ntp : int >= 0
          Number of true positives.
  
      Nfp : int >= 0
          Number of false positives.
  
      Nfn : int >= 0
          Number of false negatives.
  
      eps : float
          eps.
          Default value numpy.spacing(1)
  
      Returns
      -------
      acc: float
          Accuracy
  
      """
  
      return float((Ntp) / (Ntp + Nfn + Nfp + eps))